How can I send email from my yahoo alias account in iPhone5 mail?

How can I send email from my yahoo alias account in iPhone5 mail?

I have 2 email accounts: xyz@alias.net is an alias of xyz@yahoo.co.uk

In my old iPhone3 I had these accounts set up so that I could send and receive email from both accounts. I did this using the following settings:

‘Other’ POP account info:

Name: xyz

Address: xyz@alias.net

Description: alias

Incoming mail server:

Host name: pop.mail.yahoo.com

User name: xyz@yahoo.co.uk

Password: password for yahoo account

Server port: 995

Outgoing mail server:

SMTP: smtp.o2.co.uk (o2 is the name of my phone network)

Server port: 25

‘Yahoo!’ account info:

Name: xyz

Address: xyz@yahoo.co.uk

Password: password for yahoo account

Description: Yahoo!

Outgoing mail server:

Primary server: Yahoo! SMTP server

Server port: 465

I’ve tried using the same settings in my new iPhone5, but it doesn’t work. I can receive mail to both accounts, and can send from the Yahoo account, but I cannot send mail from the alias account. When I try, it displays the message: “Cannot send mail. A copy has been placed in your Outbox. The recipient ‘xyz@alias.net’ was rejected by the server”.

I’ve tried to configure the POP alias account using combinations of ‘pop.mail.yahoo.com’, ‘pop.mail.yahoo.co.uk’, ‘apple.pop.mail.yahoo.co.uk’ and ‘apple.pop.mail.yahoo.com’, for the incoming host, and ‘smtp.o2.co.uk’, ‘smtp.mail.yahoo.com’, ‘smtp.mail.yahoo.co.uk’, ‘apple.smtp.mail.yahoo.com’ and ‘apple.smtp.mail.yahoo.co.uk’ for the outgoing mail server. None of these have worked.

I’ve also tried setting it up using IMAP instead of POP without success. I tried configuring it using combinations of ‘imap.mail.yahoo.com’, ‘apple.imap.mail.yahoo.com’, ‘imap.mail.yahoo.co.uk’ and ‘apple.imap.mail.yahoo.co.uk’ for the incoming mail server and ‘smtp.o2.co.uk’, ‘smtp.mail.yahoo.com’, ‘smtp.mail.yahoo.co.uk’, ‘apple.smtp.mail.yahoo.com’ and ‘apple.smtp.mail.yahoo.co.uk’ for the outgoing mail server.

Yahoo say that if I can't send Yahoo! Mail from my mail program, I may be accessing the Internet through an ISP that is blocking the SMTP port, and that if this is the case, I should try setting the SMTP port number to 587 when sending email via Yahoo!'s SMTP server. I don't think that this is the problem, but I tried it just to make sure - without success.

I’ve also heard that the problem might have something to do with the SPF settings of my alias domain provider. I’m not too sure exactly what SPF settings are, or how to change them, but from what I can gather it seems unlikely that this is the problem given that I was able to send mail from my alias account on my old iPhone3.

Any help much appreciated: how can I get my alias account to send emails in iPhone5 mail?

Many thanks,

Patrick